Does the interface language change not support?

[icejd]

I searched for a long time, but I didn't find how to change the language. In addition, the toolbar seems to have no title prompt, which is not very friendly

[luin]

You could provide a customized HTML to the toolbar module. Related doc

[rock-eb]

You can set title lile this: toolbar.querySelector('button.ql-bold')?.setAttribute('title', '粗体');

[icejd]

Thank you very much. I'm working on it